No longer satisfied with hunting animals, Sturn had sentientprisoners released into a private hunting reserve, in which he would hunt them down. This outraged Malastare's native Dugs and Grans, so the captain was transferred to the Wookieehomeworld of Kashyyyk and tasked with overseeing the construction of a large skyhook in orbit by Wookiee slaves. There, he would hunt the native Wookiees, going so far as to wear their pelts as part of his uniform. He even had a private trophy room to display the severed heads of animals he had killed.

In 2 BBY, PrincessLeia Organa of Alderaan arrived on Kashyyyk as part of a trap set by EmperorPalpatine to prevent her father, SenatorBail Organa, from rebelling against the Empire. Should Senator Organa rebel, Sturn promised Leia that she would die in a Wookiee uprising. Jedi MasterRahm Kota, an ally of Senator Organa's who had led a brief rebellion against the Empire months earlier, learned of Leia's situation and tasked Galen Marek—"Starkiller," the secret apprentice of Darth Vader—with rescuing her from Kashyyyk. Leia then, in turn, tasked Marek with destroying the skyhook, and so Sturn finally saw his chance to hunt the man he assumed to be a Jedi. While Starkiller was busy removing the tractor pins that anchored the skyhook to the planet's surface, Sturn entered his personal AT-KT and attempted to kill him. Starkiller destroyed his AT-KT and killed the captain instead, just before destroying the skyhook itself.

Ozzik Sturn, a Humanmale, was born into a privileged and wealthy family of big game hunters. Using his family's connections, Sturn entered the Imperial Military and rose through the ranks. Assigned to many worlds throughout his career, his deployments allowed him to carry on the family tradition of hunting the galaxy's most wild and exotic animals, often taking their heads as trophies. As his rank increased, however, Sturn's assignments left no room for hunting. During the Great Jedi Purge led by Dark Lord of the SithDarth Vader, Sturn desperately longed for a chance to hunt a fugitive Jedi.[2]

Sturn was instead transferred to various outposts in the Outer Rim Territories, and he became frustrated with his assignments. Eventually, he was installed as a Chief Magistrate on Malastare in the Mid Rim. There, he was again able to hunt, but he had grown tired with hunting non-sentient animals. Instead, he had politicalprisoners released into a private hunting reserve, where he stalked and killed them. Though hidden, the hunting reserve was eventually discovered by the planet's native Dugs and Grans. Outraged, they revolted against Imperial rule, and the Empire suffered a high casualty rate as a result.[2] Sturn was transferred to Kashyyyk, the homeworld of the Wookiees, as a result; as of a year later, the Empire had been unable to bring Malastare's population back under control.[3]

"Princess Leia. It's an honor to have a Senatorial observer.""You can drop the charade, Captain Sturn. We both know I was sent here as a hostage to keep my father from speaking out against the Empire.""Then we both understand the situation, Senator. If your father keeps his mouth shut, I'll keep you out of harm's way. If not, you'll become the unfortunate victim of a Wookiee uprising. These slaves are mindless brutes, you know."

While on Kashyyyk, Captain Sturn supervised the construction of a skyhook that, when completed, would ferry Wookiee slaves across the galaxy[1] to serve in the construction of Imperial projects, including the first Death Star.[4] On Kashyyyk, Sturn hunted Wookiees, wearing their pelts and braids of hair on his uniform.[2] He maintained a trophy room as part of his personal quarters, and within the room he displayed the heads of a reek, an acklay, a nexu, a wampa, a tauntaun, a krayt dragon, and a Gorax, among many others. On one wall hung a Gungan encased in carbonite.[1]

In 2 BBY, opposition against the Empire was taking hold in the galaxy. Bail Organa, senator of Alderaan in the Imperial Senate and viceroy of the House of Organa, was one of several senators who felt that a change was needed. Organa, along with Senator Mon Mothma of Chandrila and Senator Garm Bel Iblis of Corellia, had been planning to create an organized rebellion against the Empire, but they were unwilling to take direct action. The Emperor knew of the growing dissent in the Imperial Senate, so he had PrincessLeia Organa, Bail's adopted daughter, sent to Kashyyyk as a "senatorial observer"—in reality, she was there as a hostage, so that her father would think twice about rebelling.[1]

The princess arrived on Kashyyyk in a Lambda-class shuttle, escorted by the Emperor's Royal Guards. Sturn greeted her when she landed, but Organa knew the truth behind her visit. Sturn responded that, as long as her father remained loyal to the Empire, no harm would come to her. If, however, she did not, Sturn would have her executed and blame her death on a Wookiee uprising. Sturn had Organa and her astromech droidR2-D2 sealed in his quarters.[1]

News of his daughter's imprisonment reached Bail Organa, who then asked his ally Jedi MasterRahm Kota, who had previously led his militia in the capture of a TIE Fighter Construction Facility above Nar Shaddaa months earlier, to rescue her. Kota assigned the task to Starkiller, Darth Vader's secret apprentice who had defeated Kota and his militia aboard the construction facility. Starkiller had secretly been tasked by his master with uniting the rebellious elements so the Empire could crush them once and for all, and he had been instructed to do whatever was necessary to complete the task. This included seeking out Kota, earning the trust of the would-be rebel leaders, and killing any Imperials.[1]

Starkiller landed on Kashyyyk and discovered Organa in Sturn's quarters, but she refused to leave until the skyhook was destroyed and the Wookiees could be liberated. Starkiller fought his way to the skyhook's mooring structure and began removing the tractor pins that kept the skyhook anchored to the ground, cutting through any stormtroopers, scout troopers, jumptroopers, or purge troopers that stood in his way. Before all the pins could be removed, Sturn entered the scene in his personal AT-KT and engaged the man he assumed to be a Jedi, fulfilling his desire to hunt one. Using his lightsaber and the Force, Starkiller destroyed the AT-KT and killed Sturn, before destroying the skyhook itself.[1]

With Sturn and the majority of the Imperial forces in the area dead, the Wookiees began celebrating. Princess Organa was able to return to her father unharmed, and, after a series of confrontations with the Empire, Starkiller convinced Senators Organa, Mothma, and Bel Iblis to sign the Corellian Treaty, officially forming the Alliance to Restore the Republic.[1]

Ozzik Sturn was an overconfident commander, believing that he could easily defeat a Jedi with whatever means were at his disposal. Rahm Kota had even described him as a madman. This proved to be the Captain's downfall, as Starkiller was able to destroy his AT-KT and kill him.[1] As he had been born into a family of big game hunters, Sturn had also taken up hunting. But hunting non-sentient creatures was not enough; he made the move from hunting animals to hunting sentients while stationed as Chief Magistrate on Malastare. This sudden desire to hunt prisoners led to a revolt against the Empire, but Sturn remained an Imperial officer. Transferred to Kashyyyk, he started to hunt the native Wookiees, despite being assigned there to oversee their enslavement.[2] He proudly wore a Wookiee pelt draped across his uniform and brands of Wookiee hair on his left shoulder.[1]

"We wanted a boss that was an Imperial Officer. At one point we thought he'd be a weird monster or shape-shifter so I did these [in the vein of] Phantom of the Opera and Predator [above]. We ended up making Ozzik a crazed hunter."

In the PlayStation 2, PlayStation Portable, and Wii version of The Force Unleashed, Sturn wears the uniform of an AT-ST pilot with his Wookiee pelt. In this version of the game, Sturn emerges from his destroyed AT-KT, only to be impaled by Starkiller with his lightsaber. In the Nintendo DS version of the game, Sturn pilots an AT-RT instead of an AT-KT. In the cell phone version, the Imperial commander on Kashyyyk wears a standard uniform and is equipped with a lightwhip, although he is never identified as Sturn.

In the N-Gage and the iPhone/iPod Touch versions of the game, Starkiller rescues Organa from a group of escorting stormtroopers in the forest. Not willing to leave while the planet's population is enslaved, Organa sends Starkiller to liberate Wookiees from a nearby prison compound. After he has set the slaves free, Starkiller faces off against an electrostaff-wielding Sturn inside the prison. The captain is also assisted by two AT-STs. Starkiller, however, manages to push the AT-STs out of the prison building and closes the doors through which they have come. When Sturn charges him with the electrostaff, Starkiller kills him with a discharge of Force lightning.